Some years ago, Mr. F. UE, DA, then a member of our Institute, collected a small sea-urchin from the Namamugi fossil zone at Kagetu-en, Turumi-si Kanagawa-ken, which is referable to
Pleurechinus ruber L. DODERLEIN, a species first founded on living specimens from “Kadsiyama, ” Japan. This is the first record in fossil.
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